/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.visitor;

import proguard.classfile.*;

/**
 * This <code>ClassVisitor</code> lets a given <code>ClassVisitor</code> optionally travel to the visited class, its
 * superclass, its interfaces, and its subclasses.
 *
 * @author Eric Lafortune
 */
public class ClassHierarchyTraveler implements ClassVisitor {
    private final boolean visitThisClass;
    private final boolean visitSuperClass;
    private final boolean visitInterfaces;
    private final boolean visitSubclasses;

    private final ClassVisitor classVisitor;

    /**
     * Creates a new ClassHierarchyTraveler.
     * 
     * @param visitThisClass specifies whether to visit the originally visited classes.
     * @param visitSuperClass specifies whether to visit the super classes of the visited classes.
     * @param visitInterfaces specifies whether to visit the interfaces of the visited classes.
     * @param visitSubclasses specifies whether to visit the subclasses of the visited classes.
     * @param classVisitor the <code>ClassVisitor</code> to which visits will be delegated.
     */
    public ClassHierarchyTraveler(boolean visitThisClass, boolean visitSuperClass, boolean visitInterfaces,
        boolean visitSubclasses, ClassVisitor classVisitor) {
        this.visitThisClass = visitThisClass;
        this.visitSuperClass = visitSuperClass;
        this.visitInterfaces = visitInterfaces;
        this.visitSubclasses = visitSubclasses;

        this.classVisitor = classVisitor;
    }

    // Implementations for ClassVisitor.

    public void visitProgramClass(ProgramClass programClass) {
        programClass.hierarchyAccept(visitThisClass, visitSuperClass, visitInterfaces, visitSubclasses, classVisitor);
    }

    public void visitLibraryClass(LibraryClass libraryClass) {
        libraryClass.hierarchyAccept(visitThisClass, visitSuperClass, visitInterfaces, visitSubclasses, classVisitor);
    }
}
